<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .parent {
                border: 2px solid #333;
                width: 100px;
                height: 100px;
              }
        .test {
              width: 40px;
              height: 40px;
              background-color: pink;
              margin-top: 25px;
         }
        </style>
        
        
</head>
<body>
    <div class="parent">
          <div class="test"></div>
        </div>
</body>
</html>